Improvement in hoisting-machines



'lnt @getinte NELSON J. WILKINSON, OF KALAMAZOO, MICHIGAN.

Letters Patent No. 102,345, dated April 26, 1870.

IMPROVEMENT IN HISTINGMACHINES.

The Schedule referred to in thee Lettere Patent and making part of the same.

Mah-.

Be it' known that I, NELSON J. WILKINSON, of Kalamazoo, Michigan, haveinvented a new and useful Machine for Hoisting Purposes; and Ifdo hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing and the letters of reference marked thereon.

The nature of my invention consists in so combining the power of the ordinary lever and fixed and movable pulleys with a lazy-tongs, that a quick, and at the same time powerful motion is produced.

Such a motion is greatly needed for hoisting purposes, and is especially adapted for lifting such weights as water from a well, masons materials from the l ground to the diierent stories of a building, merchandise in warehouses, and all light weights that need to be handled rapidly, and are at present carried by hand, like a hod of bricks, or hoisted by a windlass, like water and merchandise.

The nature of my invention is plainly shown in the drawing, which represents the hoisting-apparatus attached to the front of a'dwelling, and in use lifting a bucket of mortar to the upper story window for the purpose of plastering walls inside.

The leverA is attached at one end to a link, B, which serves as a fulcruln; and at the point O to the first cross-joint of the lazy-tongs C D.

By depressing the outer end of the lever A the lazy-tongs C D are drawn downward and closed, the short motion of the lever at O sui`cing to produce a great motion at D, depending upon the number of cross-bars in the lazy-tongs.

The motion produced atD pulls the rope E, and this rope being carried over the fixed pulleys G and H, and movable pulley I, operates to close the lazy-tongs K L, and raise the bucket I. v

The action of this machine is so evident that any one who examines the motion of a lazy-tongs will understand the results produced by my arrangement.

The lever I employv'as a substitute for the crank employed in all ordinary hoisting-windlasses; and the rope and pulleys are necessary to adapt the device for convenient use in different localities.

The three mechanical elements are thus made to o furnish a simple and efcient means for rapid elevation.

For raising a Well-bucket, the lever A, lazy-tongs C D, and rope E might sulice if the well were shallow.

For raising meat in a slaughter-house, shingles, and other building materials, packages and boxes in stores, and many other purposes, arrangements diering a little from that shown in the drawing may be required, but enough has been said to enable any ordinary mechanic to build and apply the machine for any purpose. y

In practice I iind that the lazy-tongs can be made of wood very cheaply, and strong enough for any purpose.

And, forl raising heavy weights, I find it necessary to employ pulley-blocks with a number of sheaves, so as to multiply the number of ropes in the last block, and increase the power applied to close the lazy-tongs that carriesA the load.

Claim.

What l therefore claim, and desire to secure by Letters Patent, is

The improved holster described, having in combination, the level', lazy-tongs, rope and pulleys.

NELSON J. WILKINSON.V Witnesses:

THos. S. CRANE, CHARLES H. lAdams. 

